From: Robert Houllahan (email suppressed)
Date: Mon Jan 24 2011 - 12:54:12 PST
> 10-bit uncompressed is the best video format for a film scan.
10-Bit uncompressed HD (1080x1920) is about 245Mb/sec so you would need a new computer (Mac-Pro 2008 or newer or a i7 based PC) with a fast disk array 5 1Tb drives Raid-0 or Raid-5 an eSata setup minimum, 8-drives better. It is not impossible these days with some of the latest computer hardware.
That said Pro-ResHQ 1080P is a 10-bit format with light compression and Pro-Res-444 is 10-bit with even lighter compression. For all practical purposes these will be very hard to tell from 10-bit uncompressed and have a similar range of post grading options and range (using Apple Color or DaVinci Resolve on MAC or After Effects, etc.) with less stringent drive requirements a G-Raid will do.
DPX frames are technically the best because they are really a RGB format not video YUV so they are 10bit LOG (16bit linear) with 10bits per channel in RGB. They are one .dpx file to 1 film frame. DPX scans (2k) can be loaded into Final Cut or Avid and other desktop software tools and manipulated on a very, very fast new computer. If you have a Cyan print and make a DPX scan you can bring the colors back either to normal or very close to the original look by using curves in Color or Resolve.
I transfer Std-16mm to 1080P Pro-ResHQ all the time and that includes hand painted film quite often, the Pro-ResHQ files seem to work really well for people working in Avant/Experimental Cinema projects.
Colorist/Director Cinelab Inc.
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